#!/bin/bash

# FILE: jp2-thumbnailer -- 
# AUTHOR: Robin Cornelius <robin.cornelius@gmail.com>
# DATE: 08 June 2008
# 
# Copyright (C) 2008 Robin Cornelius <robin.cornelius@gmail.com>
# Copyright (C) 2003 W. Michael Petullo <mike@flyn.org>
# All rights reserved.
# 
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
# 
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
# 
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

OUT=/dev/stdout

USAGE="[OPTION]...

  -h, -?   print this message
  -i path  set the input path   [ $IN ]
  -o path  set the output path  [ $OUT ]"

while :;
	do case "$1" in
		-h | "-?" )	
			echo -e usage: ${0##*/} "$USAGE" >&2
			exit 1 ;;
		-i )
			IN=$2
			shift ;;
		-o )
			OUT=$2
			shift ;;
		-?* )
			echo "${0##*/}: unrecognised option: $1" >&2
			exit 1 ;;
		* )
			break ;;
	esac
	shift
done

# We need to determine what type of jpeg2000 we can be either a codestream
# or an actual jpeg2000 file

#j2k_to_image is a bit dumb and makes its decisions based on file extension
# we can help it here with file -i

mime=`file -i $IN | sed "s/^.*: //g"`

if [[ $mime = "image/jp2" ]]
 then   ext="jp2"
else
	ext="j2k"
fi

temp=`mktemp -p /tmp`
cp "$IN" "$temp.$ext"
/usr/bin/j2k_to_image -i "$temp.$ext" -o "$temp.bmp"
rm "$temp.$ext"
mv "$temp.bmp" "$OUT"

